Tool-holder.



No. 707,472. Y Pamnted Aug. I9, lao?. s. WELTEH J. Anmsmom.

. TQL MULDER.

'Appucaiou med Mar. 27, 1901. (No Model.)

UNTTED 'STATES PATENT OFFICE.

SAMUEL VELTER ANDJOVHN ARMSTRONG, OF CHICAGO, ILLINOIS, ASSIGN- ORS TO ARMSTRONG BROS. rlOOL CO., A CORPORATION OF ILLINOIS.

TOOL-HOLDER.

SPECIFICATION forming' part Of Letters Patent NO. 707,472, dated August 19, 1902.

Application filed March 27, 1901. Serial No. 53,156. (No model.) v

T all whom it 71mg/ concern,.-

Beit known that we, SAMUEL WELTER and JOHN ARMSTRONG, citizens of the United States, and residents of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Toolllolders, of which the following is a specification, and which are illustrated in the accompanying drawings,forminga part thereof.

lo Our invention relates to certain improvements in tool-holders for metal planing and shaping machines, and more particularly to a holder of that type which is adapted to carry a gang or plurality of cutting-tools designed r 5 to act in unison to surface a considerable area of metal at each cutting operation.

In a tool-holder ot' the character referred to employing a fixed series of tools intended to cut over a certain area without variation 2o and not provided with means for adjusting the gang ot' tools so that the cutting area may be changed at will diiiculty has been encountered, owing tothe dilerent conditions under which the tool must be made to operz 5 ate and which conditions are due to the character-viz., the hardness orsoftness-of the metals to be surfaced. For example, a tool having its cutters fixed to surface a relatively large area at each stroke maywork easily and 3o withoutdillicultyinasoftn1etal,suchasbrass, whereas the saure tool, the cutting area being unchanged, in operating in a tough metal, such as steel, would be inoperative, owing to the great resistance offered to the cutting edges. This is true also of metals of the same class-as, for instance, cast-iron-somc pieces of which are quite soft, while others are extremely hard, and a tool set to surface a certain area of the former would be useless in 4o working in the latter.

signed to remedy these imperfections and to provide a tool capable of being adapted to thc various conditions that maj arise; and it consists generally'in mounting the series or gang of 4cutting-tools in a swiveled or adjustable head carried by the tool-holdershauk orsupport, so that the surfacing area of the cutters may be varied at will, the device being simple in construction and capable of perform- 5o ing the required workin au efiicient and satisfactory manner and being provided with Our invention is de lstructions and combination of parts, as will be hereinafter described and claimed.

Refercnceis had to the accompanyingdrawings, forming a part of this specification, in

which Figure I1 is a perspective view of the inven- 6o tion. Fig. 2 is a bottom plain View, the toolholder head heilig shown in dotted lines in an adjusted position. Fig. 3 is a vertical section. Figs. 4 and 5 are enlarged views looking in the direction of the travel of the work, showing the adjustment of the tool, the width of the feed being exaggerated for the purpose of illustration. Fig. 6 is a rear elevation of the device, partly in section, showing the adjusting means. 7o

The shank or support 15 of the tool-holder, intended to be secured in the tool-clamp of a planing or shaping machine inthe usual manner, is provided at its end with a cross-piece 16, the ends of which are preferably rounded, as illustrated, and provided with the threaded apertures 17.

Projecting centrally [from the cross-piece 16 is a circular tongue or pin 18, providing a swivel for the tool-holding head 19, the lat- 8o ter having a 'socket or 'recess 20, in which is designed to fit closely, in order to avoid any play, the tongue 18. When the tool-holding head 1f) is mounted on the cross-piece 16 before adjustment, or as illustrated in Fig. 1, the flanges 21 of the former bear against the ends ot' the cross-piecel 1b' and the rounded end of each coincides or registers with the one adjacent thereto. The head 11')k is provided withatool-carrying1nember22,parallel 9o thereto, which is provided with a plurality of apertures 23 to receive the cutting-tools 24, each of which is held in position by a sotscrew 25. 'lhe lianges L'l of the head 19 are provided with curved slots 36, the axis ofthe circular tongue 1S being taken as a center, which slots` register with the threaded apertures 17 of the crosspieec 1li, threaded bolts 27 being passed through the slots to engage the apertures 17 for securing the two memion bers together. 'lhis construction provides for a lateral or axial adjustment of the head 19 on the cross-piece 16.'

The cutting-tools 24 are arranged in a line parallelto the head 19 and under certain conditions to the crosspiece 16, and when in that position the tool may, if desired, be used for channeling; but by means ofthe swivel connectionand th'e slots 26, the bolts 27`having been loosened, the head may be turned ou the tongue 18, so that the line of the cutting'edge of all the tools 24 will be at an Aangle to the direction of travel. When thus adjusted, the tools are so disposed that each cutting edge overlaps the cutting edge of' the preceding tool and all act in unison, cutting tothe full depth and each making a successive cut and completing a determined surface by itseltwithout leaving an intervening n.

In order to avoid accidental play of the swiveled head in case the bolts 27 should not be tightened suiciently-or should become loose, screws' 27, passing through the edges ofthe flanges and entering the slots 26, are

v yprovided and are designed to serveas positive stops for the fastening-bolts 27. In adjusting the head 19 after the bolts 27' haFe been tightened up the screws 27 are moved up against the bolts, the latter to move backwardly in the slots or .the head to oscillate on its pivot is resisted by the screws. f

The adjustment of the tool will be readily understood on' reference to Figs. 4 and 5,

which for the purpose the nature of the adjustment are shown with and any tendency of,

of clearly illustrating" the angle or Obliquity of the lineifl the cutting edges of thetools greatly exaggeratedthat is to say, the width of cut as shown is much greater than that called for by the graduated scale provided for enabling the operator to quickly and accurately set the tools to any desired feed and which indicates in Fig. 4 one-eighth of an inch feed and in- Fig. 5 one-fourth. This scale, placed on one of the 'rounded ends of the cross-piece 16 and the adjacent end of the flange 2l, consists of a series of marks designed to indicate When the head is adjusted so that vthe lines desig- .nated by the same fraction of a number register a certain adjustment of the feed or area that may be covered at one cutting operation.

We claim as our invention- In a tool-holder for planing-machines, in combination, a shank, a head carried by the 4shank and having a curved slot,'a bolt passing through the slot for securing the head to `the shank, an adjustable stop entering the slot and adapted to engage the bolt, and a plurality of cutting-tools secured in and arranged in a line parallel to the head, the head being adapted to be adj usted so that the cutting edges ot' the tools will be in a line at fan angle to the direction of travel.

SAMUEL WELTER. JOHN ARMSTRONG.

Witnesses:

ALEXIS D. MICHAUD,

GRACE M. MICHAUD. 

